Egbert l



(No Model.) l

R L. BARRAGH.

WATER FILTER.

No. 356,242. J7 ed Jfma 18, 1887.

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WITNESSES N. Pains, Phomlmugmpher. wnsmgwn. u, u.

UNITED STATES' PATENT OFFICE.

ROBERT L. DARRAGH, OF'NEW YORK, N. Y.

WATER-FILTER.

SPECIFICATION forming part of Letters Patent No. 356,242, dated January 18,1887.

Application filed June 24, 1886.

To all whom it may concern.-

Be it known that I, ROBERT L. DARRAGH, of the city, county, and State of New York, have invented a new and useful Improvement in Water-Filters, of which the following is a full, clear, and exact description.

My invention consists in the construction and combination of parts, as will be hereinafter fully described and claimed,

Reference is to be had to the accompanying drawings, forming a part of this specication, in which similar letters of reference indicate corresponding parts in both the gures.

Figure l represents a vertical section of a water-hlter embodying my invention; and Fig. 2, a transverse section, on a reduced scale, upon the irregular line a: x in Fig. l.

A A indicate the body ofthe filter, forming or constituting upperand lower ch ambers, the one, A,of which is made in two vertical sections or halves united by flange-joints a a, and is fitted with a perforated cross-plate or diaphragm, b, upon which the sand, charcoal, or other ltering material c isplaced, said plate resting upon an inner flange or lugs, d. The upper body portion, A, is made in a single piece, and is united to the lower body parte, A', by a flangejoint, a. This construction ofthe body is not only a convenient one as regards putting the lilter together, but affords every facility for inserting and replacing when necessary the liltering material and perforated diaphragm.

The space above the diaphragm b constitutes I the filter proper and chamber in which the filtered Water collects, and the space below said diaphragmthesediment-chamber. The chamber A is provided at or near its top with a delivery-pipe controlled by a cock or valve, e, and the chamber A' is similarly constructed or provided with a lower outlet or extension fitted with a cock or valve, j'. This extension forms part of the sedimentchamber,and should be of considerable depth above the valve f to hold the deposit or collecting sediment.

D is the water-supply pipe of the filter, fitted with a cock or valve, g, and which may be connected with the service-pipe of a watermain or be otherwise connected to supply water under pressure. This pipe D is fitted to enter the chamber A', and is connected to or provided at its discharge end with a cup`like Serial No. 206,127.

(No model.)

spreader, S, having a perforated top disposed v to occupy a position in the upper portion of the chamber A at a short distance below the perforated diaphragm b, so as to deliver the supply-water in a series of upward jets against the under surface of the perforated diaphragm b, and to leave a lclear enlarged space outside of the spreader and belowit for the collection of the sediment. The top or cover of the spreader is preferably of convex form, and is fitted or provided with a series of raised nipples, h, where perforated for the supply-water to issue in jets through. The object of this construe tion will be hereinafter explained.A

In the operation of the filter, when the supply and delivery cocks g e are opened the supply-water entering the spreader S has its force or violence broken by the resistance which said spreader and its extended top present to it, and this, combined with the effect produced by the combined area of the perforations in said top being in excess of the area of the supplypipe, causes the supply-water to ooze or iiow in a series of gentle jets up through the perforated top or nipples h to and through the filter out agitating the water within the lower sediment-chamber or disturbing the impure matter or sediment collected in said chamber and carrying such matter or sediment into the filtering material to foul it.v Only the incoming water passes to be filtered, and after being filtered escapes through the delivery faucet or cock, the water within theportion of the chamber A below the spreader or its upper surface not being agitated by the incoming water, but remaining quiescent, thus not fouling the supply-water as it is distributed over the under area or surface of the perforated diaphragm b and up through the filtering material c.

The spreader S should be of sufficient capacity and of such enlarged area on its perforated top, near the under surface of the filtering material or perforated plate b, to insure a thorough distribution and free but gentle discharge of the supply-water over the whole bottom area of the filtering-surface without disturbing the impure matter or sediment in the main or lower portion of the chamber A.

The nipples hserve to discharge the supplyproper or perforated bottom b of the filtering- 'chamber and filtering material thereon, withwater in gentle and easy jets without disturbing the Waterlying on top of the spreader, While the convex form of the top of the spreader establishes a series of inclined courses or channels for any Water-holding sediment on said top to slip or pass off quietly along with the sediment which it carries to the space below the spreader.

When necessary, the water and sedinientin the chamber A arediseliarged by opening the cock fnvhiehwill cause the water in the upper chamber, A, to descend and clean the filter.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- ROBERT L. DARH/AGH.

Vitnesses:

A. BOURNE, A. W. Hixs'rmes. 

